Click on the link www.gov.uk for information relating to UK citizens overseas.
The following links to the UK Government website will take you directly to the information you may need to help you.
Brexit presentations are being held on a regular basis at Town Halls throughout the Valencian region to enable you to decide if you want to become a permanent resident or not.
To register as a permanent resident, you initially need to register on the Padron at the Town Hall where you decide to live. Once you have registered on the Padron, you then need to register to become a permanent resident within 90 days. You may decide you need assistance with these legal procedures, it is advisable to seek legal advice.
In the case of Orihuela Costa, the Town Hall is a satellite branch of the main Town Hall located in Orihuela city, 38km distance where all decisions are made.